Citation: CHEN Tao, TIAN Wen-Yu, LI Chun, LIU Xiao-Yu, WANG Lu-Hua, SUN Mao, ZHENG Zhong, ZHU Jian-Bo, LIU Chun-Li. Role of Pyrite inMaintaining the Reductive Environment of the Near Field for a High-Level RadioactiveWaste Repository[J]. Acta Physico-Chimica Sinica, ;2010, 26(09): 2489-2493. doi: 10.3866/PKU.WHXB20100917 shu

Role of Pyrite inMaintaining the Reductive Environment of the Near Field for a High-Level RadioactiveWaste Repository

1.
Beijing National Laboratory for Molecular Sciences, Radiochemistry&Radiation Chemistry Key Laboratory for Fundamental Science, Department of Applied Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P.R. China

Received Date: 25 February 2010
Available Online: 15 July 2010
Fund Project: 国家自然科学基金(10775008) (10775008)教育部博士点基金(20060001032) (20060001032)国防科工委军工遗留专项基金(科工计[2007]840) (科工计[2007]840)中央高校基本科研业务费专项资金和北京大学仪器测试基金(第13至18期)资助 (第13至18期)

The influence of pyrite irradiated by γradiation from ⁶⁰Co on the reductive environment of groundwater was investigated. The dose rate was 200 Gy·min^-1 and the total absorbed dose was 5×10⁶ Gy. Our results indicate that the radiolysis reactions of the γradiation of ⁶⁰Co in groundwater can help to oxidize pyrite, while the structure of pyrite is not changed. The oxidizing of pyrite consumes the radiolysis product in groundwater, which helps to maintain a reductive environment and increase the safety of the repository.
- Pyrite,
- Gamma irradiation,
- Near field,
- Reductive environment,
- High-level radioactive waste,
- Safety assessment
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